[Effect of preserved subvalvular apparatus on regional left- ventricular function after mitral valve prosthesis in patients operated on for mitral insufficiency].
Mitral valve replacement with preservation of the chordo-papillary apparatus of the posterior mitral cusp was done in 24 patients with mitral valve incompetence. In nine patients, in addition to the conventional flow manometry, myocardiography was performed to study regional left ventricular myocardial contraction. For comparison, nine other patients were examined, who had been operated on for mitral valve incompetence by conventional mitral valve replacement with total resection of all its supravalvular structures. A significant difference in the improvement of left ventricular myocardial contraction was seen in patients with preserved chordo-papillary apparatus as compared with the other group. Improvement of the contractile function is believed to be secondary to enhanced myocardial compliance during the relaxation phase, rapid filling and pre-ejection. Enhanced compliance may be a factor governing the left ventricular myocardial performance.
Konstantinov
B A
BA
Iakovlev
V F
VF
Tarichko
Iu V
IuV
Shevelev
I I
II
D002815:Chordae Tendineae / Q000503:physiopathology*; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve / Q000503:physiopathology / Q000601:surgery; D008944:Mitral Valve Insufficiency / Q000503:physiopathology / Q000601:surgery*; D009200:Myocardial Contraction / Q000502:physiology*; D010210:Papillary Muscles / Q000503:physiopathology*; D011184:Postoperative Period; D016277:Ventricular Function, Left / Q000502:physiology*
Vliianie sokhranennogo podklapannogo apparata na regionarnuiu funktsiiumiokarda levogo zheludochka posle protezirovaniia mitral'nogo klapana u bol'nykh, operirovannykh po povodu mitral'no nedostatochnosti.